Sodium and water accumulation in an injured cell are a direct result of:
Decreased ATP production
Calcification of the cell
Ribosome detachment
Dehydration
The Correct Answer is A
Choice A Reason:
Decreased ATP production is the primary cause of sodium and water accumulation in an injured cell. ATP is essential for the function of the sodium-potassium (Na±K+) pump, which maintains the ionic balance within the cell. When ATP levels drop, the Na±K+ pump fails, leading to an influx of sodium and water into the cell, causing cellular swelling.
Choice B Reason:
Calcification of the cell refers to the abnormal deposition of calcium salts within the cell. While calcification can occur in injured cells, it is not directly responsible for sodium and water accumulation. Calcification is more related to chronic injury and cell death rather than acute cellular swelling.
Choice C Reason:
Ribosome detachment from the endoplasmic reticulum can occur due to cellular stress and injury, leading to reduced protein synthesis. However, this detachment is not the direct cause of sodium and water accumulation. The primary issue is the failure of the Na±K+ pump due to decreased ATP production.
Choice D Reason:
Dehydration refers to the loss of water from the body or cells. While dehydration can affect cellular function, it is not the cause of sodium and water accumulation in injured cells. The accumulation is primarily due to the failure of the Na±K+ pump, which is dependent on ATP.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","C"]
Explanation
Choice A Reason:
Acidosis is indicated by a pH lower than the normal range of 7.35-7.45. In this case, the patient’s pH is 7.3, which confirms acidosis. Acidosis can be caused by either respiratory or metabolic factors, but the low pH alone confirms the presence of acidosis.
Choice B Reason:
Compensation refers to the body’s attempt to return the pH to normal by adjusting the levels of CO2 or HCO3-. In this case, the HCO3- level is within the normal range (22-26 mEq/L), indicating that there is no metabolic compensation occurring. Therefore, this choice is incorrect.
Choice C Reason:
Respiratory acidosis is indicated by an elevated PaCO2 level, which is higher than the normal range of 36-44 mmHg. The patient’s PaCO2 is 48 mmHg, suggesting that the acidosis is due to respiratory factors. This is consistent with the patient’s history of smoking and symptoms of respiratory distress.
Choice D Reason:
Alkalosis is indicated by a pH higher than the normal range of 7.35-7.45. Since the patient’s pH is 7.3, which is below the normal range, this indicates acidosis, not alkalosis. Therefore, this choice is incorrect.
Choice E Reason:
Metabolic acidosis is indicated by a low HCO3- level. In this case, the patient’s HCO3- level is within the normal range (25 mEq/L), indicating that the acidosis is not metabolic. Therefore, this choice is incorrect.
Correct Answer is A
Explanation
Choice A: Size
Muscular hypertrophy refers to the increase in the size of muscle cells12. This process typically occurs as a result of strength training, where the muscles are subjected to stress and damage, leading to the repair and growth of muscle fibers. The increase in muscle cell size enhances muscle strength and mass, making it a key goal for athletes and bodybuilders.
Choice B: Vacuoles
Vacuoles are membrane-bound organelles found in cells, primarily involved in storage and transport of substances3. While vacuoles play important roles in cellular function, they are not directly related to muscular hypertrophy. The primary change in muscular hypertrophy is the increase in muscle cell size, not the number or size of vacuoles.
Choice C: Types
Muscle cells can be categorized into different types, such as slow-twitch (Type I) and fast-twitch (Type II) fibers4. However, muscular hypertrophy does not involve a change in the types of muscle cells. Instead, it focuses on the growth and enlargement of existing muscle fibers, regardless of their type.
Choice D: Number
An increase in the number of muscle cells is referred to as hyperplasia, which is different from hypertrophy. Hyperplasia involves the formation of new muscle cells, whereas hypertrophy involves the enlargement of existing muscle cells. Current evidence suggests that hypertrophy, rather than hyperplasia, is the primary mechanism for muscle growth in response to strength training.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today